Classifications

• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
  • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
  • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
  • E04C5/18—Spacers of metal or substantially of metal
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
  • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
  • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
  • E04C5/162—Connectors or means for connecting parts for reinforcements
  • E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
  • E04C5/165—Coaxial connection by means of sleeves
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T403/00—Joints and connections
  • Y10T403/47—Molded joint
  • Y10T403/472—Molded joint including mechanical interlock
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T403/00—Joints and connections
  • Y10T403/70—Interfitted members
  • Y10T403/7041—Interfitted members including set screw

Definitions

• the present invention relates to a mortar-filled rebar joint used in a reinforced concrete method, and more particularly to a joint usable for butt-joining of opposing rebars used not only in a Brecast concrete method but also in a cast-in-place concrete method.
• the rebar In the cast-in-place concrete method, the rebar is assembled into a building structure at the construction site, where the rebar is often butt-joined to another rebar.
• a break concrete member is assembled into a concrete structure at a construction site, but in many cases, one precast concrete member is attached to the end of each reinforcing bar projecting from another member. It has at least one joint inside to be joined. Both precast concrete members have opposing ends of the reinforcing bars to be joined to each other, and in any of these concrete methods, it is necessary that the reinforcing bars be fixed and supported immediately after they are abutted. There are times. Therefore, a mortar-filled joint that can firmly hold the reinforcing bar before the mortar is solidified has been desired.
• both the crimping and butt welding methods require equipment for heating the end of the reinforcing bar and the skill of the operator. At least, it is difficult to perform reliable welding work on site.
• the butt welding method requires complicated pre-processing of the reinforcing bar end face before welding.
• the double joint method requires at least 20 times as long as the diameter of the reinforcing bar in the axial direction, and requires an allowance for reinforcing bars.
• This lap joint method is not suitable for use with large-diameter rebar. This is because the overlap of the large-diameter rebar reduces the amount of concrete to an inappropriate level.
• the force bra joint method has the disadvantages that a thread cutting operation is required at the end of the reinforcing bar and one of the reinforcing bar and the force bra has to be rotated.
• a thread cutting operation is required at the end of the reinforcing bar and one of the reinforcing bar and the force bra has to be rotated.
• the secondary stress generated by welding heat has an unfavorable effect on the relative positional relationship between Brecast concrete members that are joined together.
• An object of the present invention is to solve the above-mentioned problems, and to provide a mortar-filled makeup hand that can be used for both the cast-in-place concrete method and the precast concrete method.
• This fitting is Reinforcing bars are held firmly before the barrel is solidified.
• This joint makes the butting of both rebars simple and reliable without the need for special heating equipment, cumbersome pre-processing and skills.
• the large-diameter rebars are joined to each other without reducing the amount of concrete from a desired amount, and the Brecast member is used when they are joined to each other. No adverse secondary stress is applied. Disclosure of the invention
• the mortar-filled rebar joint according to the present invention is provided with a metal tubular slot provided with openings at both ends thereof for inserting a reinforcing bar, and a filler tube at the bottom of the pipe for filling the mortar into the inside. Consists of one bu. At least a pair of outer and inner support protrusions for supporting the reinforcing bar are provided on the inner peripheral surface of the tubular sleeve. Further, the tubular sleeve is provided with holes through which fixing means for fixing the reinforcing bar to the support protrusions are inserted in each tubular portion between the pair of outer and inner support protrusions. Generally, the support protrusion is arranged so as to support the rebar coaxially with the tubular sleeve.
• the tubular sleeve In a tubular sleeve that supports one of the rebars, the tubular sleeve is provided with a set of fixing means and a pair of outer and inner support protrusions.
• the outer support protrusions are tubular. It is formed integrally with the end of the sleeve.
• the support protrusion has a cross section in which a concave portion for supporting a reinforcing bar is formed.
• the cross section is optionally formed in the shape of a hollow circle, sector, rectangle or trapezoid.
• the cross section may have at least one radial cut.
• the recess is optionally formed in a curvilinear or V-shape.
• the outer and inner support projections are integral with each other and have an axially continuous support surface that is longer than the separation between the protrusions of the adjacent nodes of the reinforcing bar. Form a shaped support projection. For this reason, the reinforcing bar is always supported on the support surface at the convex portion of the node.
• the securing means is selected from bolts or bins.
• the bolt is screwed into the hole from outside to secure the rebar to the support projection.
• Either a taper bin or a spiral spring pin is pushed into the hole from outside to secure the rebar to the support projection.
• the holes are optionally formed such that the pins are oriented perpendicular or tangential to the rebar.
• the mortar-filled joint is used in both the cast-in-place concrete method and the precast concrete method to firmly support the reinforcing bar before the mortar is solidified. It can be used for butt joints of rebar. The use of this joint does not require any heating equipment, cumbersome pre-machining of the opposing ends of the rebar, or the inconvenience of rotating either the rebar or the force bra. This joint enables relatively large-diameter reinforcing steel bars to be joined without overlapping. Generally speaking, this mortar-filled joint makes it possible to easily perform extremely reliable butting of rebar. BRIEF DESCRIPTION OF THE FIGURES
• FIG. 1 is an elevation view showing a mortar-filled rebar joint according to the present invention
• FIG. 2 is a longitudinal sectional view showing the structure of a joint having a reinforcing bar and a filler and their relation,
• FIG. 3 is a sectional view taken along section line A—A in FIG. 2,
• FIG. 4 is a sectional view showing another embodiment
• FIG. 5 is a longitudinal sectional view showing a part of another embodiment
• FIG. 6 is a longitudinal sectional view showing a part of another embodiment
• FIG. 7 is a longitudinal sectional view showing another embodiment
• FIG. 8 is an elevation view showing a joint used for the cast-in-place concrete method
• FIG. 9 is an elevation view showing a joint used for the cast concrete method
• FIG. 10 is a sectional view showing still another embodiment
• FIG. 11 is a cross-sectional view showing still another embodiment
• FIG. 12 is a perspective view showing a helical spring pin used as a fixing member.
• FIG. 1 shows an appearance of a mortar-filled reinforcing steel joint 1 according to the present invention.
• the joint 1 supports the opposing reinforcing steel 20.
• the mortar-filled rebar joint 1 includes a metal tubular sleeve 2.
• the tubular sleeve 2 is of unitary construction and is preferably made of copper.
• the tube sleeve 2 has two openings 3 formed in both end walls 4 thereof.
• the opening 3 has an inner diameter smaller than the inner diameter of the tubular sleeve 2 but larger than the outer diameter of the reinforcing bar 20 inserted through the opening.
• On the inner peripheral surface of the tubular sleeve 2 two pairs of outer and inner support protrusions 5, 6 are provided on the inner peripheral surface of the tubular sleeve 2, two pairs of outer and inner support protrusions 5, 6 are provided on the inner peripheral surface of the tubular sleeve 2, two pairs of outer and inner support protrusions 5, 6 are provided on the inner peripheral surface of the tubular sleeve 2, two pairs of outer and inner support protrusions 5, 6 are provided on the inner peripheral surface of the tubular sleeve 2, two pairs of outer and
• the outer and inner support projections 5, 6 are circular. It has a similar cross section of a hollow circular shape with a shaped recess 14.
• the circular recess 14 is eccentric so as to support the reinforcing bar 20 coaxially with the tubular sleeve.
• the outer support projection 5 has an eccentric recess integrated with the opening 3 of the tubular sleeve 2.
• Two threaded holes 13 are formed at two axial positions in the bulge of the bulge sleeve 2 between the respective outer and inner support projections 5,6.
• the hole 13 is in the same angle direction as the eccentric recess with respect to the axis of the tube sleeve 2.
• a bolt 7 as a fixing means is inserted into the hole 13 from the outside such that the bolt end presses the reinforcing bar toward the support protrusions 5 and 6.
• a charging roller 8 for injecting 1 into the inside of the tubular sleeve 2 is provided. Further, the tube sleeve 2 has an outer peripheral surface near the other end wall 4 for allowing air to flow out from the tube sleeve 2 when the mortar 21 is filled into the tube sleeve 3. An exhaust port 9 is provided.
• the tubular sleeve 2 is provided with a plurality of annular protrusions 10 on its inner wall surface.
• the annular projection 10 has a lower radial height than the supporting projections 5 and 6.
• the annular projections 10, like the support projections 5, 6, increase the internal surface area of the tubular sleeve 2 for adhesive bonding with the mortar.
• the tubular sleep 2 is provided with a severing body 11 for preventing the rebar 20 from being excessively inserted, and is disposed at a longitudinally central portion of the inner peripheral surface thereof.
• the two tube seals 1 2, 12 are fitted into the outer housing of the end wall 4 to make the inside of the tube sleeve 2 liquid-tight. Rebar 20 penetrates each seal 12.
• the seals 12 are fitted to the respective reinforcing bars 20 while sliding them. ⁇ Insert the muscles 20 through the respective openings 3 and into the tubular sleeve 2.
• the striking positions of the rebars 20 are set by the separator 11. That Later, the bolts 7 are screwed into the holes 13 so as to press the individual rebars 20 against the respective support protrusions 5,6. In this way, the two rebars 20 are firmly supported between the bolt 7 and the support protrusions 5 and 6 so that the axes of the rebars 20 and the tubular sleeve 2 match. Attach each seal 12 to end wall 4.
• the mortar 21 is injected into the tubular sleeve 2 through the filling boiler 8 until the mortar is filled in the inner space of the tubular sleeve 2. If mortar flows out from the exhaust port 9, it means that the tubular sleeve 2 has been filled with mortar.
• the mortar 21 solidifies, the joining of the rebar 20 ends. Since the tubular sleep 2 firmly holds the rebar 20 before the mortar solidifies, the rebar 20 is never messed up.
• the butt joint between the opposing rebars 20 in the cast-in-place concrete method can be performed simply and with high reliability.
• this joint 1 can be used to easily and reliably butt-join opposing rebars 20 protruding from both precast concrete members 22 in the precast concrete method.
• One outer support projection 17 is separated from the end wall 4 as shown in FIG.
• the outer support projection 18 forms an elongated support projection having a support surface 28 that is continuous in the axial direction and is longer than the distance between the protrusions of the nodes of the reinforcing bar 20. Therefore, it is formed integrally with both the inner support projection and the end wall 4.
• the outer supporting projections 19 are separated from the end wall 4, but are integrated with the inner supporting projections to form a supporting surface 29 that is connected in the axial direction. Is formed.
• the support protrusion has any cross-sectional shape suitable for supporting the rebar coaxially with the tubular sleeve in cooperation with the fixing means. You may.
• the support projection 15 has a rectangular cross section with a semicircular recess 27.
• the bolt 7 presses the reinforcing bar 20 against the recess 27 in order to hold the reinforcing bar 20 coaxially with the tubular sleeve 2.
• the support projection 25 has a fan-shaped cross section provided with a V-shaped recess 30.
• the support projection may have any longitudinal sectional shape as long as it is suitable for supporting the reinforcing bar in parallel with the tubular sleeve in cooperation with the fixing means. As shown in FIG.
• the supporting projections 16 and 17 have right-angled and isosceles-triangular longitudinal sections, respectively.
• Bolts 7 are screwed into holes 13 to hold rebar 20 coaxial with tubular sleeve 2.
• the elongated projections 18 and 19 have solid and hollow rectangular longitudinal sections, respectively.
• Bolts 7 are inserted into holes 13 to hold rebar 20 coaxially with tubular sleeve 2.
• a pin can be used instead of a screw bolt to fix the reinforcing steel 20.
• the taper pin 23 is pushed into a hole 24 whose axis is radially oriented with respect to the common axis of the reinforcing bar 20 and the tubular sleeve 2.
• the taper pin 23 presses the rebar 20 at its end into the V-shaped recess 30 of the support projection 25.
• the tubular sleeve 2 is selectively formed with a hole 33 oriented in a chordal direction with respect to the circular cross section of the tubular sleeve 2 in the tubular portion.
• Taber pin 32 is pushed into hole 33 tangential to rebar 20. This pin 32 presses the rebar 20 against the support projection 30 on its side.
• the tapered pin described above can be replaced with a spiral spring pin 34 as shown in FIG.

Landscapes

• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Reinforcement Elements For Buildings (AREA)
• Joining Of Building Structures In Genera (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=17789656

Family Applications (1)

Country Status (11)

Cited By (4)

Families Citing this family (49)

Citations (3)

Family Cites Families (4)

• 1996
  • 1996-01-17 JP JP00575696A patent/JP3237050B2/ja not_active Expired - Lifetime
  • 1996-11-01 MY MYPI96004565A patent/MY118979A/en unknown
  • 1996-11-08 WO PCT/JP1996/003282 patent/WO1997017511A1/ja not_active Application Discontinuation
  • 1996-11-08 CN CNB961913266A patent/CN1155761C/zh not_active Expired - Lifetime
  • 1996-11-08 GB GB9711635A patent/GB2311311B/en not_active Expired - Lifetime
  • 1996-11-08 AU AU75066/96A patent/AU702616B2/en not_active Expired
  • 1996-11-08 US US08/860,173 patent/US5974761A/en not_active Expired - Lifetime
  • 1996-11-08 KR KR1019970704526A patent/KR100423782B1/ko not_active IP Right Cessation
  • 1996-11-08 NZ NZ321675A patent/NZ321675A/xx not_active IP Right Cessation
  • 1996-11-26 TW TW085114556A patent/TW329447B/zh not_active IP Right Cessation
• 1998
  • 1998-01-22 HK HK98100591A patent/HK1007066A1/xx not_active IP Right Cessation

Patent Citations (3)

Also Published As

Similar Documents

Legal Events